Automatic stop for looms



March 28, 1950 w, v PomDEXTER 2,501,915

AUTOMATIC STOP FOR LOOMS INVENTOR. Willmm VZD.P0index-fer Hiforney March 28, 1950 Filed Jan.

W. V. D. POINDEXTER AUTOMATIC STOP FOR LOOMS 2 sheets-Sheet 2 I N V EN TOR. Wil liam VD.Poindex.ier

fiiiorney.

Patented Mar. 28, 1950 UNITED STATES e TENT oFFic-s This invention relates to looms and more particularly a harness stop motion forthe same.

The primary ob ect of this invention resides in the provision of a harness stop motion for looms adapted to be connected to th drop eye stopmotion thereof and automatically stop the same when. the harness cord breaks.

Another object of this invention resides in the provision of a harness stop motion adapted to .be disposed beneath the harness of a loom and connected to the conventional stop motion thereof so as to automatically stop the loom whenthe harness cord breaks.

A further object of this invention resides in the, particular construction of theharness stop motion.

A still further object. of this inventionresides in the particular adjusting means for the main spring and latch.

With these and other objects in view, this invention resides in certain novel features of construction and arrangement of elements to be hereinafter more particularly set forth in the specification, illustrated in the accompanying drawings and pointed out inthe appended claims and, although this disclosure'depicts my present conception of the invention, the right is reserved to resort to such departures therefrom as come within the scope of the claims.

In the accompanying drawings forming a part of this application;

Fig. 1 is a side view of the harness stop motion disposed in inoperative position beneath the harness of a loom.

Fig. 2 is a plan View thereof.

Fig. 3 is a side view of the harness stop motion disposed in operative position with the harness resting thereon.

Fig. 4 is a perspective View of the automatic harness stop motion.

Fig. 5 is an enlarged perspective view of the contact supporting block of the harness stop motion.

Fig. 6 is an enlarged vertical sectional view taken approximately on line B6 of Fig. 4.

Fig. 7 is a perspective view of the adjustable standard.

In the present illustration of this invention, the numeral 5 designates a 100m harness stop motion consisting of a main standard 6 having a base 1 formed on its lower end and provided with an elongated slot 8 formed in its upper portion. Said base 7, although herein shown as being formed on the lower end of the standard 6 as by twisting and bending the same at right angles, may be welded or otherwise secured thereto.

Secured against one sideof the upperportion of the main standard 6, as by a boltI9 extending through the same and said slot 8, is 'an adjustable standard l0 while secured on the opposite side of the main standard by said bolt .Slis a substantially L-shaped block I l against the outer surface of which an elongated arm i2 is adjustably mounted on that portion of the bolt 9 projecting through and beyond the block II and having a nut l3 screwed on its outer end 'to tighten said elements in rigid. relation to the main standard.

The arm I2 is provided with an elongated slot M in its inner portion to accommodate theouter portion of said'bolt while its outer portion is reduced in width and bent to form a right angularly disposed'lug l5 thereon adapted to extend in spaced relation to the rear end E of the main standard and receive the lower looped end of a retractile coil spring l6 which is connected at its upper end to the rear end of an elongated harness operated arm I! pivotally secured to saidadjustable standard by a substantially inverted U-shaped bracket I8 having a bolt. [9 extended therethrough and provided .with a nut 20; -Said arm I I and'bracket I8 are pivotally secured to the standardltl by a bolt 2l'having one end of a wire spring 22 looped therearound and retained thereon by a nut 23 with its medial portion looped around the bolt 19 and retained thereon by the nut 20 and its opposite end looped around and similarly retained on a bolt 24 extending through plates 25 secured to the upper end of a latch arm 26 which is pivotally connected to the aforesaid elongated arm l! by a pivotal pin 21 extending therethrough and the upper ends of said plates.

The inner lower portion of the latch arm 26 is provided with a groove 28 disposed upwardly of a contact finger 28 adapted to normally rest against the bevelled forward end of said block under the influence of the wire spring 22 and, upon being forced downwardly by the weight of the harness of the loom resting on the harness arm i! subsequent to breaking the harness cord, it is permitted to slide beneath the block and engage a contact 29 insulated from and secured on the lower forward surface of the block and connected to the drop eye stop motion wire (not shown) of the loom by an electric wire 30 so as to stop operation of the loom until the harness cord is repaired and latch manually released to again dispose the harness stop motion in normal position beneath the raised harness.

In order to prevent the harness from slipping off the arm [1, an upturned finger 3| is secured to the forward end thereof.

With the harness stop motion assembled as heretofore set forth, it is secured to the cross beam of a loom with the harness operated arm disposed beneath the suspended harness and thereafter adjusted to meet the demands of the operator and, through the instrumentality of the electric circuit connecting the conventional stop motion of the loom to the harness stop motion, operation of the loom will immediately cease when the harness cord breaks.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. The combination with the stop motion of a loom and its harness, a main standard secured to the loom adjacent the harness thereof, an adjustable standard secured to the main standard, a harness operated arm pivotally secured to the adjustable standard with its forward end extending beneath the harness of the loom and its rear end extending rearwardly of its pivotal point, a substantially L-shaped block adjustable vertically on the main standard with the forward portion thereof disposed beneath the harness operated arm, a latch bar pivotally connected to the harness operated arm with its lower end provided with a block receiving groove, a finger formed on the lower end of said latch bar and slidably resting against an opposed bevelled surface of the block, a spring secured to the adjustable standard and exerting inward pressure on the latch arm, a spaced contact on the lower forward surface of the block in the path of said finger when in locking position, an adjustable arm secured against the outer surface of the block, a lug formed on the rear end of the adjustable arm and lying beneath the rear end of the harness operated arm, a retractile coil spring connecting the rear end of the harness operated arm to the lug on said adjustable arm, an upturned finger secured to the forward end of the harness operated arm, and an electric wire connecting the contact to the stop motion of the loom.

2. A harness stop motion, comprising, a main standard having an elongated slot disposed Ver- 4 tically in its upper end, a base formed on the lower end of the main standard, an adjustable standard disposed against one side of the main standard with its upper end extending above the upper end of said main standard, a substantially L-shaped block disposed against the other side of the main standard with its forward portion disposed in opposed relation to the forward edge of the main standard, an elongated harness operated arm, a substantially inverted U-shaped bracket secured to the rear portion of said harness operated arm with its lower ends straddling the upper end of said adjustable standard, an adjustable arm having an elongated slot therein and its rear end decreased in width disposed against the outer surface of said block, a lug formed on the reduced end of the adjustable arm and lying beneath the rear end of the harness operated arm, a retractile coil spring connecting the lug of the adjustable arm to the rear end of the harness operated arm, a pivotal bolt connecting the harness operating arm bracket to the adjustable standard, a latch bar having a block receiving groove in its lower end pivotally suspended from the harness operated arm on that side of its pivot opposite the coils spring engaging side thereof, a finger formed on the lower end of the latch bar and slidably seated against the forward bevelled end of the block, a wire spring having its medial portion looped around the securing bolt of the harness operated arm with one end looped around the pivot bolt thereof and its other end secured to the upper portion of said latch bar and exerting inward pressure on the same, a spaced contact on the lower forward surface of the block in the path of said finger on the latch bar, an electric wire connected to the contact, a bolt extending through the adjustable standard, a slot in the main standard, block and slot in the adjustable arm, a nut threaded on the outer end of said bolt and securing the standard, block and adjustable arm together, and an upturned lug secured to the forward end of the harness operated arm.

WILLIAM V. D. POINDEXTER.

No references cited. 

